Accordin tae the 2010 Census,[5] ethnic Roushies at 3,109,661 made up 95.1% o the oblast's population. Ither ethnic groups includit Tatars (44,103, or 1.4%), Mordva (19,138, or 0.6%), Ukrainians (17,657, or 0.5%), an various smawer groups, each accoontin for less nor 0.5% o the oblast's tot population. Additionally, 42,349 fowk wur registered frae admeenistrative databases, an coud no declare an ethnicity. It is estimatit that the proportion o ethnicities in this group is the same as that o the declared group.[11]

↑The density value wis calculatit bi dividin the population reported bi the 2010 Census bi the aurie shawn in the "Aurie" field. Please note that this value mey nae be accurate as the aurie specified in the infobox is nae necessarily reportit for the same year as the population.